tyler.durden
/
audk
mirror of https://github.com/acidanthera/audk.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

UefiCpuPkg/MpInitLib: Implementation of MpInitLibGetNumberOfProcessors() 

Cc: Michael Kinney <michael.d.kinney@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Giri P Mudusuru <giri.p.mudusuru@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Jeff Fan <jeff.fan@intel.com>
Reviewed-by: Michael Kinney <michael.d.kinney@intel.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Michael Kinney <michael.d.kinney@intel.com>
This commit is contained in:
Jeff Fan 2016-07-21 00:34:19 +08:00
parent 6a2ee2bb63
commit 809213a679
1 changed files with 38 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

39
UefiCpuPkg/Library/MpInitLib/MpLib.c
View File

@ -956,6 +956,7 @@ MpInitLibWhoAmI (
{
return EFI_UNSUPPORTED;
}
/**
Retrieves the number of logical processor in the platform and the number of
those logical processors that are enabled on this boot. This service may only
@ -983,9 +984,45 @@ MpInitLibGetNumberOfProcessors (
OUT UINTN *NumberOfEnabledProcessors OPTIONAL
)
{
return EFI_UNSUPPORTED;
CPU_MP_DATA *CpuMpData;
UINTN CallerNumber;
UINTN ProcessorNumber;
UINTN EnabledProcessorNumber;
UINTN Index;
CpuMpData = GetCpuMpData ();
if ((NumberOfProcessors == NULL) && (NumberOfEnabledProcessors == NULL)) {
return EFI_INVALID_PARAMETER;
}
//
// Check whether caller processor is BSP
//
MpInitLibWhoAmI (&CallerNumber);
if (CallerNumber != CpuMpData->BspNumber) {
return EFI_DEVICE_ERROR;
}
ProcessorNumber = CpuMpData->CpuCount;
EnabledProcessorNumber = 0;
for (Index = 0; Index < ProcessorNumber; Index++) {
if (GetApState (&CpuMpData->CpuData[Index]) != CpuStateDisabled) {
EnabledProcessorNumber ++;
}
}
if (NumberOfProcessors != NULL) {
*NumberOfProcessors = ProcessorNumber;
}
if (NumberOfEnabledProcessors != NULL) {
*NumberOfEnabledProcessors = EnabledProcessorNumber;
}
return EFI_SUCCESS;
}
/**
Get pointer to CPU MP Data structure from GUIDed HOB.